Improvement in machines for bending sockets



' PW. BLAKEY.

Machines fr enfing Suche@` No. 134,349. Patented Dec.31,1872.

MILDRED BLAKEY, OF ETNA, PENNSYLVANIA, ASSIGNOR TO HIMSELF,

GEO. A. OHALFANT, AND J. L. ROBERTSON, OF SAME PLACE.

IMPROVEMENT lhl EviACl-ililES FOR EENING SOSKETS.

Specification forming part of Letters Patent No. lllllitb, datedDecember 31, 1872.

To all whom it may concern:

Be it known that I, MILDRED BLAKEY, of Etna, in the county of Alleghenyand State of Pennsylvania, have invented a new and useful Improvement inMachine for Bending Circular Forms; and I do hereby declare thefollowing to be a full, clear, and exact description thereof, referencebeing had to the accompanyin g drawing making part of this specication,in which- Figure 1 is a side elevation of my improved machine; Fig. 2 isa sectional view through the line a: Fig. l, and Fig. 8 is a sectionalviewthrough the line y y, the dies being closed.

Like letters of reference indicate like parts in each.

My invention consists in the machine hereinafter described and claimed,which is used for the purpose of bending circular-form metallie sockets,rings, &c.

The operative parts of my machine are all moved by power from the mainshaft a., which is mounted on suitable bearings b b. The crank o on theshaft a, by means of the arms d d, pivoted at their opposite ends to thecrank and to the lugs e e, communicates a reciprocating motion to thedie-blocks ff. The die-blocks ff, by means of their collars f f', arehinged or pivoted to the shaft g, which is mounted on suitable bearingsg g. The dies h h are set into or fastened or secured to the front faceof the die-blocks f f by a dovetail or other proper joint or fastening.The inner faces of the dies h h are coneaves of the proper form to givethe desired shape to the article to be bent. The cam or eccentric i onthe shaft a operates against the shoulder 7c of the forked lever 7chinged to the cleat Z. The forks ofthe lever k extend into the groove min the mandrel n, which operates in the guides 0 o. By the action of thecam 't' upon the shoulder 7c the mandrel n is forced back to theposition shown by dotted lines in Fig. l. When the eccentricity of thecam i ceases to engage or is turned past the shoulder 7c', the mandrelis drawn forward by the recoil of the spring p, which is fastened to theguide-frame o and the forked lever 7c. When in position the mandrel nstands directly above the dies h h', as shown in Fig. 1, so that whenthey operate the dies will close around it, as shown in Fig. 3. At theside of the machine, where it is fed, standing just clear of the path ofone of the dies, h', is a knife or shear, q, rigidly secured to thepiece q', which operates, in connection with the die hf, to cut oft' theblanks from the bar or sheet of iron.

'lhe operation is as follows: Power is communicated to the shaft a bymeans of a bandwheel or in any other known or suitable way. The shaft aoperates the other parts of the machine in the manner described. Whenthe dies It 7L are in the position shown in Fig. l the end of a bar orsheet of iron is inserted between them and the mandrel n. The dies 7Lh', then coming up, fold or bend the blank around or against the mandreln, and at the same time the shear q outs off the blank at the properlength. Thefurther revolution of the shaft a causes the dies to beopened, and turns the cam t' so that it engages the shoulder 7c', andthereby withdraws the mandrel a from the blank, so as to allow the blankto fall onto4 the bed r, from whence it is removed.

By changing the mandrel and the dies, which is an operation of littletrouble or labor, different sizes and shapes of socket-blanks, rings, orbands may be made on this machine.

Other devices for operating the dies and the mandrel in the mannerdescribed maybe substituted for those described, and answer equallyWell.

The dies l1J h may be reversed so as to close downward and bend theblank down against the mandrel instead of upward, as shown.

What I claim as my invention, and desire to secure by Letters Patent, is

'I he hinged dies h 7i', opened and closed by suitable connectionsthence to a crank-motion, c, in combination with theintermittently-reciprocating mandrel u and the stationary shear q,constructed and arranged substantially as and for the purposes setforth.

In testimony whereof I, the said MILDRED BLAKEY, have hereunto set myhand.

MILDRED BLAKEY.

Witnesses:

A. S. NroHoLsoN, T. B. Kuna.

